444423431 has 2 divisors, whose sum is σ = 444423432. Its totient is φ = 444423430.

The previous prime is 444423403. The next prime is 444423437. The reversal of 444423431 is 134324444.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444423431 is a prime.

It is a super-3 number, since 3×444423431³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 444423394 and 444423403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444423437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222211715 + 222211716.

It is an arithmetic number, because the mean of its divisors is an integer number (222211716).

Almost surely, 2^444423431 is an apocalyptic number.

444423431 is a deficient number, since it is larger than the sum of its proper divisors (1).

444423431 is an equidigital number, since it uses as much as digits as its factorization.

444423431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 29.

The square root of 444423431 is about 21081.3526843037. The cubic root of 444423431 is about 763.1308009848.

Adding to 444423431 its reverse (134324444), we get a palindrome (578747875).

The spelling of 444423431 in words is "four hundred forty-four million, four hundred twenty-three thousand, four hundred thirty-one".